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TMS320F2800137: Why remove the Flash API in the ROM?

Part Number: TMS320F2800137


Hi Experts,

My customer is working on a S/W porting based on F28002x and they want to check if there is any S/W modification needed to migrate F280013x. They notice that Flash API is not in the ROM for F280013x, but it exist for F280025. So customer wondered why the ROM was removed. Is there any reason behind it? Thanks~

F280013x BOOT ROM memory map as below:

F28002x BOOT ROM memory map as below:

Could you clarify the more difference? Thanks~